diff --git a/cubesatsim/cubesatsim.ino b/cubesatsim/cubesatsim.ino
index bab8e476..9fc1d010 100644
--- a/cubesatsim/cubesatsim.ino
+++ b/cubesatsim/cubesatsim.ino
@@ -3783,7 +3783,7 @@ void config_gpio() {
 	
   randomSeed(raw);	
 	
-  for (int j=0; j++; j < 20)
+  for (int j=0; j<20; j <++)
 	  Serial.println(rand_float(-.2, .2);
 
   pinMode(AUDIO_IN_PIN, INPUT);